Rainfall Estimation and nowcasting using composite Radar Data


Rainfall Estimation and nowcasting system use composite Radar Data which covers northern, eastern, central, northeastern, and southern Thailand. The Radar system enable real-time monitoring and forecasting overall water situation of the country. Since the Radar Data has high spatial and temporal resolutions, it precedes the primitive rainfall measurement’s limitation.

  • Calibration of the Numerical Relationship in Equation between the reflection of Radar (Z) and the rainfall (R) using rainfall measurement from HII ground stations
  • The Real-time Satellite-based Rainfall Bias Correction using rainfall measurement from HII ground stations
  • The nowcasting of rainfall with 1 – 3 hour lead-time by Centroid Tracking

Forecasting of Heavy Rain in Bangkok

On 7 June 2019, heavy rain in various areas of Bangkok and the accumulative rainfall exceeds 100 millimeters within 1-2 hours and caused  floods in many major roads.

The Podul and Kajiki Tropical Storm

During 29 August – 4 September 2019, heavily rain in many provinces in northeastern of Thailand due to the influence of Podul and Kajiki tropical storms caused serious flooding in many provinces, and the most hazardous areas is Ubon Ratchathani province.